Machine for truing-engine crank pins or shaft-end bearings



Apr 6, i926. 1,5?952'46- M. REDMOND MACHINE FOR TRUING ENGINE CRANK PINS OR SHAFT END BEARINGS Filed May `26, v1924 4 Sheets-Sheet l ,0 INI/ENTOR M zsdmvvcl,

` A TTORNE YS Ama es,

M. REDMOND MACHINE FOR TRUING ENGINE CRANK PINS OR SHAFT END BEARINGS F'led-May 26, 1924 4 Sheets-Sheet 2 Y ATTORNEYS Aprl 6 1926.

M. REDMOND MACHINE Fon TRUING ENGINE CRANK PINS 0R SHAFT END BEARINGS Filed May 26, 1924i 4 Sheets-Sheet 5 1N VENTOR WITNESSES ATTORNEYS I pri 6 1926. 1,579,246

M. REDMOND MACHINE FOR TRUING ENGINE CRANK PINS OR SHAFT END BEARINGS Filed May 26, 1924 4 Sheets-Sheet 4 WITNESSES IN VEN TOR BY M "if ATTORNEYS patented pr. 6, i925.

U ht STAT MICHAEL REDMDND'; OfF CDEVELND,I.QI-IOE.

MACHINE.' FOR.' '.LBdIIINGr` ENGINE CRANK- PINS: 0175# SHAFTTEND= BEARINGS:

Application ledMay, 26, 1924.. SeriaLNa 716,005.A

I To cllaoz'om t mog/.concern KABo it known thatil'ivroHnnL- RDMOND, a citizen otL theUnitedlStates, andlresident ot Cleveland'7` inthe countyv ot'A Guyahoga. and State o Ohio,. have iiixf'ented` certain new and useful. improvements in Machines for Truing. llfngjfifne` Crank Pins or. ShattfEnd Bearings, ot.V whichthe, following.V isY a speci.'- hcation..

Myv invention .relates toV improVements.` in machines Jfor. tfrning. the cranl'; pins-1 ot" enginesandfv the like,. and'. it consists ot' the constnuctioifls,l` combinations and arrangementsherein, described'. and. claimed.

An obj ect otfthe invention-.is :to provide a relatitfely. small.. hand operatedl machine which. is readily attachablc toV the-endete crank pin to hetrued, the machine being aecurately. sustained. in. the. operating.. position hy a` single` holt. which. is. screwed. into` the threaded part ot4 azhorev which forms part ot, the oiling;` system.-`

Ancther object ot-.the invention is to providey amachine for. the. purpose described Whichrinakes the Work ot'truinga crank pin or. cnd of an axle relatively simple in that the use of. elaborate machinery is not involved and further. that the. engine neednot he dismantled to any great extentfinforder to appli7 the machine.

@ther objects and adif'antages Will appear in the-following speciication, reference being. had to the accompanying drawings in .which Figure. l. is aY side elevation ot' the i1n proif'egd crankpin truing machine.,

Figure'is a detailsection taken substantiallj)7 on. the line. 2 2 oFig. l', buhheing connedsolly. to illustratingthe stationary plate in. reference to Which the machine Works.L

Figure 3" is a. Vertical section oltv the machine portions heingshovn in elevation.

Figure 4f is a. detail perspective View of the upper` part otthe rotatable casing which lits uponrthe stationary plate.

E'gure 5 is ati-.ont elevation ofthemachine.`

Figure 6 Yis afcrossV seetionon the linee-6 ofhligurel;F

Figure T' isy a.l detail cross sectionvv on'. the line Ti-Tot Figure 5, showingthe manner ot` mounting,v the starv Wheel tripper.

Figurefgislaplan View ofthe machine.

Figure 9fis atletailcrosssection on the line 9-9 otfFigin'e 3,".illustrating one ot the carriage slides andthe associated: toolpost' slide. Figure 10 1s a detail cross section on the line 10-*10 otFigure 8.

Figure 1'1 is a -detaillside elevation ofthe 60 stationary. plate all carriedparts removed.

Figure lQ'is a section on the line 19/-12 of' Figure 3; particularly illustrating the casing' retaining ring.

Figure-lis a detail perspectiveview' of 65 one of" the bearing blocks ot the stitf'ening ringfr Figure 14 is afdetail'cross'section on the line llt-lift -o'tFigure 13.

Figure; I5' is aY sectional' diagram iliustrat- 70 ingjthe action otl the fingeron thecarriage in` pushingthe tripper out`ot'the p ath of the star Wheel in order' to automatically' stop the movement" otthe. carriage.

Figure 16 is ai detail perspective vien/'ot 75 one of thetool post slides.

Reference" ishrst made to. Figs; l"v and 3 which show'the machine in`v place" uponv the end ot a crank pinC to be' truedf Theeutting; action otftheinachine.;issiinilarto that 80 otalathe, but unlike a lathe;` the Work'remains` stationary While the4 machine turns. The circular plate lf'isstationarily"securedto the end? ot. the crank pin. by' means ot" a holt Qn which4 is" screwed into the threaded 85 portionot thiscasing iasaL circular open- 95 ingf?" 4) WhichY has a` Working; liti upon the' huh' 5i TheperipheralA Hnge 8V of the casing; contacts.: and: rides upon: the le'ri'pher7 of the' stationary" plate l. A

ring'Q' is securedE to theF flange" 8-- from the 100 rear' byune'ans'otl' screws l'Oin order" to retain the; casing upon theV stationary plate. The casing and. all of its carried partS't-iuai uponthe stationary'plate. AiillerfL is interposed between ther` end of'y the" crank pin 105 and1 the stationary plate Lin' orderthat the' cut may' he carrie'ch to' the end: of: the crank pin; It desirablegthe stationaryplate may merely hei made tliickerg. thus: avoiding the use' otthe tiller "anch accomplishingf'the saine l 10 purpose'.

The' turningY is` accomplished by incansofY has :i T-Siot 'ffmc-Lui he cry-s.' plum? mt H10 51H11@ de if) :mii

um le Qq to 'he openin turn upmi gli with and drin ing in u.

extends Turning m direction, i0

causes h@ machine o tu faction. Th@ rf" (iinmoiicaiij ments 19 upm e slides QG are u (Fig/:10). C ments 19 fui-5. 'L` 22 and Q3 to rev-'give 01 ieepiiig the g2/ iis in iVQ to ik@ i'zzabie CTG? 111mg am' prin" 25 front facs of 7 Q5 to provide fooi Uii.,

i l of a Hang?. Ahe gagging F1@ head vid@ the Swivel They sci-ow is given *joy propo? diiecbi m e0 gw ringe 28 'fmwvmfi ov" c zulk pin C. the meanwhile and :i por crank pin by nimml of which is Uiii the aXis of thetripper. Neither the finger 46 nor the tripper is intended to be bent. Each finger `is-com'posed of a strip of metal given a quarter turn at (Fig. 15) so that the free end stands at right angles to the Vportion 66 which is .fastened to a carriage 28 by means of a Vscrew 67. VThe screw passes through a slot 68, the slot providing for adjustment of the finger. The free end of the finger'is nptnrned at 69, and `at the n proper time the beveled endV of the linger en'A gages the slightly rounded end 72 of the vtripper L16, so that Vby successively pushing the tripper outward, a condition will be reached when the tripper will no longer project into the path of the star wheels 26.

The turning of the feed screws 83 then stops.

The slots in the tripperpermit the displacing movement mentioned. Y

Tn reference to the recesses 25 in the supporting enlargements 19 ofthe casing 6 it is tobe observed in Figure 5 that these are Acompleted by complementary recesses in Y Figs. 3 and 5).

The operation may be readily understood `from the following additional description. The truing machine is composed of the casing 6 with its peripheral flange 8, the plate 1 upon which the casing is held by means of the retaining ring 9, the rail 20 and the ring 5a which is fastened .to the rail to aid in generally stiffen'ing the structure.

All of the foregoing parts, with the eX- ception of the plate 1 and the filler 9L (if used) are rotatable, the rails 20 carrying tools 35 bearing against the surface of the crank pin C for the purpose of taking off a shaving and thus trning the surface.

Use is made of the threaded portion 3 of.

an oil bore in the crank pin to screw in a bolt 2 and thus secure the plate 1 to the end of the crank `pin so that it will not turn. It is upon this plate and its carried hub 5 that all of the mechanism turns. This includes the stiflening ring 5-1 which carries bearing blocks 56 to serve as a steady rest and keep the machine central.

A. crank 15 (Fig. 8) is the means by which the machine is operated by hand. Turning of this crank yturns the pinion 13 and the large gear 11 vwith which it meshes. t is preferable to turn the crank 16 in the clockwise direction, although it may be turned in jectedto a one-sixth turn.

a counterclockwise direction with equally good results so far as the operation of the machine is concerned. The tripper 16 eX- tcnds back from the luga? on the boss 17 of the fined arm 18 and each time one of thc starwheels 26 meets the tripper it is sub-` The feed screws 8S are consequently similarly turned with the result that the carriages v28 (Figs. 6 and 9) are gradually'moved forwardly to prop erly advance into the metal. Cutting to the very end ofthefcrank pin is assured by appropriately adjusting the tools 35 at angles as the end is neared. s

A s soon as the cutting tools 35 come within a predetermined distance from the end of the cra k pin the properly adjusted finger 53 will so engage and push the tripper 16 outward little by little so that the latter will be ultimately displaced ont of the path Vof the star wheels 26 and turning of the latter will not result. Turning of the crank 16 may be continued but the carriages will be advanced no farther. lnasmnch as the operator is supposed to watch the action of the ymachine he will be informed bythe fact that the finger 53 is pushing the tripper that it is time to cease operating the machine. The rugged construction of the machine and the balanced disposition of the parts provide a mechanism which is very effective for the purpose intended. The foregoing rugged construction also prevents chattering or vibrating of the tools regardless of how heavyv or light the cuts taken may be.

lllhile the construction and arrangement of the improvetL truing machine as herein described and claimed is that of a generally preferred form, obviously modifications and `changes may be made without departing from the spirit of the invention or the scope of the claims.

1 claim 1. A machine for the purpose described comprising a circular plate having a hub, means by which'the plate is rigidly secured to the article to be trned, a casing of such shape to engage both the periphery and hub of the plate, means secured to the casing for.

retaining it upon the plate, a. tool, means carried lby the casing in respect to which the tool is movable, said means including a rail, means including a feed screw for moving the tool along the rail, means including a tripper which is supported in a relatively fixed position by said plate, means including a star wheel carried by the feed screw for periodically engaging the tripper, and means suppnrted by said fixed plate operating to turn the casing in respect thereto whereby to move said tool around said article and cause the aforesaid periodic engagcment of the vstar wheel.

2. A machine for the purpose described comprising a plate having a hub, an arm lis so mounted as to permit said displaceing move-ment.

8. A machine for the purpose described comprising a circular plate, means by which it is stationarily aliixed to the article to be trued, a rotatable casing carried by the plate, means supported by the plate for turning the casing upon the plate, a tool, a tool post and slide supporting the tool, a carriage upon which the formerare mounted, a rail carried by the casing along which the carriage is slidable, means for advancing the carriage including a feed screw having a star whe-el, means supported by thestationary plate including a tripper which is periodically engaged by the star wheel to turn the feed screw and advance the carriage, means forming part of the mounting of the tripper permitting a pushing movement, and means carried by the tool slide including a finger for successively engaging and displacing gradually the tripper from the path of the star wheel to ultimately stop the turning of the feed screw.

9. A machine for the purpose described comprising a circular plate havingv a hub, an arm integral with and extending from the hub, a bearing boss carried by the arm having a pendant lug, means passing through the plate at the. base of the hub to secure the plate stationarily to an article to be trued, truing means rotatably mounted on the plate including a' cutting tool, means for advancing the cutting tool axially of the work during rotation including a feed screw having a star wheel, a tripper which is periodically engaged by the star wheel to thereby impart a turn to the feed screw, means including a screw for fastening the tripper at one end to the lug, means by which the tripper is additionally but yieldably secured, said means including a stud passing through a slot in the tripper, a spring on the stud and a nut adjustable on the stud against the spring; and means carried by said boss arranged to turn by hand to rotate the truing means.

10. A machine for the purpose described comprising a circular bearing plate, means by which said plate is stationarily mounted upon the article to be trued, cutting means including a tool, means by which said tool is carried both circumferentially and axially of said article in the cutting operation, said means including a casing which has rotatable bearing on the plate, means extending rearwardly from the casing including rails, a stiifening ring substantially at the extremities of the rails to which the rails are aliixed, means extending inwardly from the ring including blocks bearing on the article, and means supported by the stationary plate for rotating the casing upon the plate together' with all of its carried parts.

11. ln combination with an article to be trued including a crank. pin having a threaded axial bore forming part of a lubricating system, a circular bearing plate having a central hole, means including a bolt to pass through the hole and screwed into the threaded bore for the purpose of stationarily aiixing the plate to said article, rotating means supported by the plate, rota-table means having bearing supporton the plate and operated by said rotating means, a plurality of rails extending rearwardly from said rotatable means, a stiflening ring to which all the rails are adjustably aflixed, said ring including inwardly extending channels, means adjustable in said channels including blocks having Shanks, said blocks bearing and sliding upon the article as said rotatable means is turned, a carriage carried by each rail having a screw bolt and slide, a tool carried by the tool post bearing against the article, means for adjusting the tool post slide in reference to the carriage and article, means for advancing the carriages along the respective rails including feed screws having star wheels, and means including a tripper fixed upon said stationary plate and periodically engageable by the star wheels to successively turn the feed screws.

MICHAEL REDMOND. I` 

